"Irish Sky Garden" at the Liss Ard Estate, County Cork, Ireland - photo from publicart.ie; Liss Ard (also Lios Aird) contains 150 acres of gardens, trails, pools, woodland walks, and 'garden rooms.' The giant earth and stone art work "Irish Sky Garden" was created by James Turrell. The 'bowl' of the 162' x 82' crater is accessed by a long megalithic-like passage. http://www.publicart.ie/main/directory/directory/view/irish-sky-garden/c3d8dc7a8a615d82fb98988577463ede/
The Guinness Storehouse in Dublin. Despite being devoted to beer, this museum is surprisingly fun for kids with gigantic old-fashioned brewing equipment to try out, vats of barley to touch and taste, and an indoor waterfall!
The Ghan .... The 3000km trip between Darwin and Adelaide provides glimpses of Australia's unique landscape and wildlife. I travelled on the Ghan between Adelaide and Alice Springs in 1982. Despite travelling through desert, a flood isolated us for several days. A wonderful, once in a lifetime, experience.
Entrance to Marble Arch Caves. A long flight of stairs through the forest leads to the Cladagh River entrance of the Marble Arch Caves, Northern Ireland's longest known cave system. via Emily Miller on Flickr